During designing a water supply line of a housing complex, two distribution pipes of different diameters, 2 cm and 6 cm respectively, are connected with the main supply pipe line. The velocity of flow of water in the pipe of 2 cm diameter is how many times that in the 6 cm diameter pipe?

Which Indian independence movement leader was primarily known for his philosophy and practice of non-violent civil disobedience?

Who gave the call for 'Do or Die' during the Quit India Movement in 1942?

Which of the following revolutionary pairs were imprisoned together in Cellular Jail and faced harsh conditions, contributing significantly to the Indian independence movement?